Add emacs, jdk x64, ncurses_so, autoconf, automake, clisp, diffutils, ffcall, libsigsegv, m4, powerline fonts & update zsh, vim, ncurses

Added htop package

Added Nano and Rsync packages

Don't re-download tarballs every time

Exact warning follows, WARNING:timestamping does nothing in combonation with -O

And, '-N' option to timestamp check. Just in case there really is a new
file.

Update crew

Modify the download method to specify an output filename

Update install.sh

Make sure wget outputs to the required filename

added tig - ncurses based Git browser

Dart SDK 1.5.3 binary package

Node.js 0.10.29

added ctags